<div class="inBox">
    <div class="title" (click)="change(hidone,hidtwo,hidthree)">
       <ng-content select="[panel-title01]"></ng-content>
    </div>
    <div #hidone class="hid">
        <ng-content select="[panel-content01]"></ng-content>
    </div>
    <div class="title" (click)="change(hidtwo,hidone,hidthree)">
        <ng-content select="[panel-title02]"></ng-content>
     </div>
     <div #hidtwo class="hid">
         <ng-content select="[panel-content02]"></ng-content>
     </div>
     <div class="title" (click)="change(hidthree,hidtwo,hidone)">
        <ng-content select="[panel-title03]"></ng-content>
     </div>
     <div #hidthree class="hid">
         <ng-content select="[panel-content03]"></ng-content>
     </div>
</div>